Two atoms scattering at low and cold energies

Pramana

Hasi Ray1 2 3¹ 

[1] National Institute of Technical Teachers’ Training and Research Kolkata, Salt Lake City, Kolkata 700 106, India$$

关键词: Coulomb interaction;    elastic scattering;    interatomic potential;    dipole–dipole;    long range;    scattering length;    four-centre;    ab-initio.;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

A modified static-exchange model is developed to study the collision of an atom with another atom. It includes the effect of long-range dipole–dipole van der Waals interaction between two atoms in addition to the exact effect of short-range force due to Coulomb exchange between two system electrons. Both these interactions dominate at colder energies. The system is treated as a four-centre problem in the centre-of-mass frame. The present ab-initio model is useful to study the two-atomic collisions at low energies, as well as cold energies. The new code is applied to study the scattering of positronium (Ps) by hydrogen (H), both in their ground states.

【 授权许可】

Unknown